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(a) Use Rydberg formula to calculate the wavelengths of the four visible lines in the Balmer...

(a) Use Rydberg formula to calculate the wavelengths of the four visible lines in the
Balmer series of light emitted by a hydrogen gas-discharge lamp. A diffraction grating of
width 1 cm has 2500 slits. It is used to measure the wavelengths of the visible spectrum of
hydrogen. (b) Determine the first-order diffraction angles of the four observed lines. (c)
What is the angular width of each one of them?

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